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Message-ID: <45F57C52.1010105@rtr.ca> Date: Mon, 12 Mar 2007 12:14:10 -0400 From: Mark Lord <lkml@....ca> To: Greg KH <greg@...ah.com> Cc: Oliver Neukum <oneukum@...e.de>, Adrian Bunk <bunk@...sta.de>, Andrew Morton <akpm@...ux-foundation.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [BUG} usb-serial regression in 2.6.21-rc2-git3 ..and here is a retest with linux-2.6.21-rc3-git7 of simply plug/wait/unplug a USB hub/serial/parallel/PS2 gizmo. I have two of these, with different serial port hardware in each, and doing this with either of them produces an ooops. 12:12:02 kernel: usb 4-2: new full speed USB device using uhci_hcd and address 2 12:12:02 kernel: usb 4-2: configuration #1 chosen from 1 choice 12:12:02 kernel: hub 4-2:1.0: USB hub found 12:12:02 kernel: hub 4-2:1.0: 5 ports detected 12:12:02 kernel: usb 4-2.3: new full speed USB device using uhci_hcd and address 3 12:12:02 kernel: usb 4-2.3: configuration #1 chosen from 1 choice 12:12:02 kernel: input: MTC PS/2 to USB converter as /class/input/input9 12:12:02 kernel: input: USB HID v1.10 Keyboard [MTC PS/2 to USB converter] on usb-0000:00:1d.3-2.3 12:12:02 kernel: input: MTC PS/2 to USB converter as /class/input/input10 12:12:02 kernel: input: USB HID v1.10 Mouse [MTC PS/2 to USB converter] on usb-0000:00:1d.3-2.3 12:12:02 kernel: usb 4-2.4: new full speed USB device using uhci_hcd and address 4 12:12:03 kernel: usb 4-2.4: configuration #1 chosen from 1 choice 12:12:03 kernel: drivers/usb/serial/usb-serial.c: USB Serial support registered for MCT U232 12:12:03 kernel: usb 4-2.5: new full speed USB device using uhci_hcd and address 5 12:12:03 kernel: usb 4-2.5: configuration #1 chosen from 1 choice 12:12:03 kernel: mct_u232 4-2.4:1.0: MCT U232 converter detected 12:12:03 kernel: usb 4-2.4: MCT U232 converter now attached to ttyUSB2 12:12:03 kernel: usbcore: registered new interface driver mct_u232 12:12:03 kernel: drivers/usb/serial/mct_u232.c: Magic Control Technology USB-RS232 converter driver z2.0 12:12:03 kernel: drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 5 if 0 alt 1 proto 2 vid 0x0711 pid 0x0300 12:12:03 kernel: usbcore: registered new interface driver usblp 12:12:03 kernel: drivers/usb/class/usblp.c: v0.13: USB Printer Device Class driver 12:12:06 kernel: usb 4-2: USB disconnect, address 2 12:12:06 kernel: usb 4-2.3: USB disconnect, address 3 12:12:06 kernel: usb 4-2.4: USB disconnect, address 4 12:12:06 kernel: mct_u232 ttyUSB2: MCT U232 converter now disconnected from ttyUSB2 12:12:06 kernel: BUG: unable to handle kernel NULL pointer dereference at virtual address 00000168 12:12:06 kernel: printing eip: 12:12:06 kernel: f8ca6542 12:12:06 kernel: *pde = 00000000 12:12:06 kernel: Oops: 0000 [#2] 12:12:06 kernel: PREEMPT 12:12:06 kernel: Modules linked in: usblp mct_u232 radeon drm nfsd exportfs lockd nfs_acl sunrpc acpi_cpufreq cpufreq_ondemand cpufreq_powersave cpufreq_userspace cpufreq_stats freq_table cpufreq_conservative ac fan button thermal video battery container processor rfcomm l2cap bluetooth cfq_iosched deflate zlib_deflate twofish twofish_common serpent blowfish des cbc ecb blkcipher aes xcbc sha256 sha1 crypto_null af_key af_packet sbp2 usbhid hid pl2303 usbserial mousedev pcmcia snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_timer ipw2200 snd ieee80211 ieee80211_crypt ohci1394 serio_raw psmouse soundcore snd_page_alloc pcspkr sdhci firmware_class ahci ieee1394 yenta_socket rsrc_nonstatic pcmcia_core ehci_hcd mmc_core b44 mii uhci_hcd usbcore intel_agp agpgart sg sr_mod cdrom unix 12:12:06 kernel: CPU: 0 12:12:06 kernel: EIP: 0060:[<f8ca6542>] Not tainted VLI 12:12:06 kernel: EFLAGS: 00010206 (2.6.21-rc3-git7 #7) 12:12:06 kernel: EIP is at mct_u232_shutdown+0x39/0x65 [mct_u232] 12:12:06 kernel: eax: 00000001 ebx: f7649cc0 ecx: c20df5c0 edx: 00000078 12:12:06 kernel: esi: 00000000 edi: f7649cc0 ebp: f5c45c18 esp: f7437e38 12:12:06 kernel: ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068 12:12:06 kernel: Process khubd (pid: 1949, ti=f7436000 task=f7d8da10 task.ti=f7436000) 12:12:06 kernel: Stack: f6c2c478 00000000 f6c2c478 f7649cc0 00000001 f7649cc0 f8a29ca1 f7649cc0 12:12:06 kernel: f7649cc0 f5c45c18 f88c5a43 f7649cf4 f8a29c18 c01ab1b5 00000202 00000000 12:12:06 kernel: f6c2c400 f7649cc0 f6c2c400 f7649cc4 f8a297f7 c01ab1b5 00000001 f5abec67 12:12:06 kernel: Call Trace: 12:12:06 kernel: [<f8a29ca1>] destroy_serial+0x89/0x122 [usbserial] 12:12:06 kernel: [<f88c5a43>] usb_kill_urb+0x4e/0xcb [usbcore] 12:12:06 kernel: [<f8a29c18>] destroy_serial+0x0/0x122 [usbserial] 12:12:06 kernel: [kref_put+95/110] kref_put+0x5f/0x6e 12:12:06 kernel: [<f8a297f7>] usb_serial_disconnect+0x81/0xaa [usbserial] 12:12:06 kernel: [kref_put+95/110] kref_put+0x5f/0x6e 12:12:06 kernel: [<f88c7ca8>] usb_unbind_interface+0x2a/0x59 [usbcore] 12:12:06 kernel: [__device_release_driver+110/139] __device_release_driver+0x6e/0x8b 12:12:06 kernel: [device_release_driver+29/50] device_release_driver+0x1d/0x32 12:12:06 kernel: [bus_remove_device+113/129] bus_remove_device+0x71/0x81 12:12:06 kernel: [device_del+308/405] device_del+0x134/0x195 12:12:06 kernel: [<f88c652d>] usb_disable_device+0x5c/0xbb [usbcore] 12:12:06 kernel: [<f88c2f8d>] usb_disconnect+0x82/0x104 [usbcore] 12:12:06 kernel: [<f88c2f7b>] usb_disconnect+0x70/0x104 [usbcore] 12:12:06 kernel: [<f88c397a>] hub_thread+0x30b/0x9ed [usbcore] 12:12:06 kernel: [activate_task+153/172] activate_task+0x99/0xac 12:12:06 kernel: [schedule+1148/1311] schedule+0x47c/0x51f 12:12:06 kernel: [autoremove_wake_function+0/51] autoremove_wake_function+0x0/0x33 12:12:06 kernel: [<f88c366f>] hub_thread+0x0/0x9ed [usbcore] 12:12:06 kernel: [kthread+155/191] kthread+0x9b/0xbf 12:12:06 kernel: [kthread+0/191] kthread+0x0/0xbf 12:12:06 kernel: [kernel_thread_helper+7/16] kernel_thread_helper+0x7/0x10 12:12:06 kernel: ======================= 12:12:06 kernel: Code: 00 74 1c c7 44 24 08 35 6e ca f8 c7 44 24 04 ca 6e ca f8 c7 04 24 47 71 ca f8 e8 46 1b 47 c7 89 fb 31 f6 eb 23 8b 53 14 83 c2 78 <8b> 82 f0 00 00 00 85 c0 74 0f c7 82 f0 00 00 00 00 00 00 00 e8 12:12:06 kernel: EIP: [<f8ca6542>] mct_u232_shutdown+0x39/0x65 [mct_u232] SS:ESP 0068:f7437e38 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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